EP0561205B1 - Auffangvorrichtung für kontinuierlichen Tintenstrahl mit Schirmstruktur - Google Patents

Auffangvorrichtung für kontinuierlichen Tintenstrahl mit Schirmstruktur Download PDF

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Publication number
EP0561205B1
EP0561205B1 EP93103268A EP93103268A EP0561205B1 EP 0561205 B1 EP0561205 B1 EP 0561205B1 EP 93103268 A EP93103268 A EP 93103268A EP 93103268 A EP93103268 A EP 93103268A EP 0561205 B1 EP0561205 B1 EP 0561205B1
Authority
EP
European Patent Office
Prior art keywords
catcher
screen
throat
drop
ink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93103268A
Other languages
English (en)
French (fr)
Other versions
EP0561205A2 (de
EP0561205A3 (de
Inventor
David J. c/o Eastman Kodak Company Stephens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kodak Versamark Inc
Original Assignee
Kodak Versamark Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kodak Versamark Inc filed Critical Kodak Versamark Inc
Publication of EP0561205A2 publication Critical patent/EP0561205A2/de
Publication of EP0561205A3 publication Critical patent/EP0561205A3/xx
Application granted granted Critical
Publication of EP0561205B1 publication Critical patent/EP0561205B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B41J2/185—Ink-collectors; Ink-catchers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B41J2/185—Ink-collectors; Ink-catchers
    • B41J2002/1853—Ink-collectors; Ink-catchers ink collectors for continuous Inkjet printers, e.g. gutters, mist suction means

Definitions

  • the present invention relates to drop-catcher devices for continuous ink jet printing apparatus and, more specifically, to improved flow control constructions for controlling the flow of caught ink.
  • continuous ink jet printing apparatus have a print head manifold cavity to which ink is supplied under pressure so as to issue in streams from a print head orifice plate that is in liquid communication with the cavity.
  • Periodic perturbations are imposed on the liquid streams, e.g. vibrations by an electromechanical transducer, to cause the streams to break up into uniformly sized and shaped droplets.
  • a charge plate comprising an array of addressable electrodes, is located proximate the break-off points of the streams to induce an electrical charge, selectively, on adjacent droplets, in accord with print information signals.
  • Charged droplets are deflected from their normal trajectory; e.g. in one common (binary) printing mode, charged (non-print) droplets are deflected into a catcher device and non-charged droplets proceed to the print medium.
  • a number of different catcher devices have been developed as constructions to intercept and recirculate the non-print droplets from such print heads.
  • the catcher devices must take several potential problems into account. First, the catcher device must intercept the non-print ink droplets in a way that avoids splattering them onto the print medium, or scattering into an ink mist, which also can cause defects on the print media. Second, the catcher devices must effectively remove the caught ink away from the droplet interception zone so that a build-up of ink in the catching surface does not block the flight path of printing drops.
  • a partial cross-sectional schematic view of the prior art catcher assembly generally designated 18 includes a catcher body 30 defining a catcher face 20, a catcher throat 22 and a screen 48 in the catcher throat.
  • the screen 48 is folded as shown in FIG. 10 and inserted into the catcher throat 32 after construction of the catcher 18. To be effective, the screen 48 in the catcher throat 22 must be held flush to the catcher face 20 and must encompass the entire throat opening 22.
  • a catcher assembly construction includes a catcher body defining a catcher throat and screen means disposed in the catcher throat for wicking ink into the catcher throat, the screen means having a first relatively fine mesh screen portion folded around a second relatively coarse mesh screen portion, whereby the fine mesh screen portion is protected against compression.
  • means are provided in the catcher throat for cooperating with the screen for physically locating the screen in the throat.
  • FIG. 1 A schematic side view of an ink jet print head of the type employed with the present invention is shown in FIG. 1.
  • the print head generally designated 10, includes a resonator assembly 12 having an ink manifold and orifice plate (not shown) for generating filaments of ink 14.
  • the resonator stimulates the filaments to break off into droplets in the region of charging electrodes 16 on a catcher assembly generally designated 18.
  • Drops of ink are selectively charged by the charging electrodes and deflected onto a catcher face 20 and into a catcher throat 22. Uncharged drops proceed undeflected to a print medium (not shown). Collected ink is withdrawn through a catcher tube 24 and is recirculated.
  • FIG. 2 shows a side view of an electrode coupon 26 formed as taught by U.S. Patent No. 4,560,991 issued December 24, 1985 to W. Schutrum.
  • the electrode coupon 26 includes a plurality of charging electrodes 16 and conductors 17 formed by electroplating on an etchable substrate 28 such as copper foil.
  • FIG. 3 A top view of the catcher assembly body 30 is shown in FIG. 3.
  • the electrode coupon 26 was attached by epoxy to the top of the catcher body 30 and the substrate 28 removed by etching to leave the conductor 17 and charging electrodes 16 on the catcher assembly body 30.
  • FIG. 4 A bottom view of the catcher assembly body 30 is shown in FIG. 4.
  • a recess 32 is molded into the bottom of the catcher body 30, with lands 34 projecting into the recess.
  • a hole 36 for receiving the catcher tube 24 is provided through the catcher body 30 into the recess 32.
  • FIG. 5 shows a front view of catcher assembly 18.
  • a catcher plate 38 is bonded to the bottom of the catcher body 30, for example, with epoxy resin, to enclose recess 32 and define catcher throat 22.
  • the catcher assembly is provided with a resistive heater 40 embedded in the catcher body for controlling condensation of moisture on the catcher face 20 and charging electrodes 16.
  • a fine mesh screen form 48 shown in FIG. 6 is folded along a line 50 around a thick mesh insert 51 shown in FIG. 7 to form a screen sandwich and the screen form sandwich is inserted into the catcher body recess 32 as shown in FIG. 8.
  • the lands 34 cooperate with locating features 35 in the screen form to positively locate the screen form in the catcher body throat.
  • the catcher throat screen 48 serves to wick ink into the catcher throat as described in U.S. Patent Application 724,039.
  • the coarse mesh insert 51 prevents the fine mesh screen 48 from collapsing in the catcher throat but does not adversely affect the pressure drop in the catcher throat.
  • the catcher plate 38 is bonded to the bottom of the catcher body 30 to retain the screen in the catcher throat 22.
  • An ink jet print head having a 2,54 cm (one inch) wide array of charging electrodes 16 was prepared according to the present invention employing a fine mesh screen of 325 mesh 0.004 cm (.0014 inch) diameter stainless steel wire screen (twilled square weave) and a thick mesh insert of 30 mesh 0.028 cm (.011 inch) diameter wire screen (plain square weave).
  • the locating features in the catcher throat positively located the catcher screen at the desired location, and the thick mesh insert prevented the thin mesh screen from collapsing without adversely affecting ink flow and pressure drop in the catcher throat.
  • the catcher assembly 18 includes a catcher body 30 defining a catcher throat 22 with a fine mesh screen 48 located in the catcher throat 22.
  • a coarse mesh insert 51 folded into the fine mesh insert 48 prevents the coarse mesh insert from collapsing in the catcher throat 22.
  • a catcher plate 38 forms the bottom of the catcher assembly 18.
  • the catcher assembly is particularly advantageous in that the catcher throat screen is positively located in the catcher throat and will not become dislodged due to acceleration of the print head.
  • a further advantage occurs in that the catcher screen resists compression due to the coarse mesh insert without adversely affecting flow properties of ink in the catcher.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)

Claims (6)

  1. Auffangvorrichtung in einem Tintenstrahl-Druckkopf, aufweisend:
    a) einen Vorrichtungskörper, der an der Vorrichtung eine Verengung bildet; und
    b) eine in der Verengung angeordnete Netzeinrichtung zum dochtartigen Einsaugen von Tinte in die Verengung, wobei die Netzeinrichtung einen ersten, relativ feinmaschigen Bereich des Netzes aufweist, der um einen zweiten, relativ grobmaschigen Bereich des Netzes gewickelt ist, wodurch das feinmaschige Netz gegen Zusammendrücken geschützt ist.
  2. Auffangvorrichtung in einem Tintenstrahl-Druckkopf, aufweisend:
    a) einen Vorrichtungskörper, der an der Vorrichtung eine Verengung bildet;
    b) eine in der Verengung angeordnete Netzeinrichtung zum dochtartigen Einsaugen von aufgefangener Tinte in die Verengung; und
    c) wobei im Vorrichtungskörper Haltemittel gebildet sind, die mit der Netzeinrichtung zusammenarbeiten, um diese in der Verengung körperlich zu halten.
  3. Vorrichtung nach Anspruch 2, wobei die Netzeinrichtung außerdem einen ersten, relativ feinmaschigen Bereich des Netzes aufweist, der um einen zweiten, relativ grobmaschigen Bereich des Netzes gewickelt ist, wodurch das feinmaschige Netz gegen Zusammendrücken geschützt ist.
  4. Verbesserte Tropfenauffangvorrichtung für einen kontinuierlich arbeitenden Tintenstrahl-Drucker, der eine lineare Anordnung von Öffnungen zum Erzeugen eines linearen Vorhanges paralleler Tropfenströme aufweist, wobei die Auffangvorrichtung aufweist:
    a) eine längliche Tropfenaufprallfläche, die angrenzend an einen Zwischenbereich des strömenden Tropfenvorhangs angeordnet ist;
    b) eine Einrichtung, die
    i) eine an die Tropfenaufprallfläche angrenzende und strömungsabwärts davon gelegene Tinten-Eintrittsmündung und
    ii) einen Tintenaustrittskanal bildet, der einen mit der Eintrittsmündung gekoppelten Verengungsbereich aufweist;
    c) eine erste Netzeinrichtung, aufweisend mehrere Öffnungen, die sich entlang der Tinten-Eintrittsmündung erstrecken und im wesentlichen mit der angrenzenden Tropfenaufprallfläche fluchten; und
    d) Haltemittel in der Tropfenauffangvorrichtung, um die Netzeinrichtung positiv zu halten und im wesentlichen mit der Tropfenaufprallfläche zu fluchten.
  5. Verbesserte Tropfenauffangvorrichtung für einen kontinuierlich arbeitenden Tintenstrahl-Drucker, der eine lineare Öffnungseinrichtung zum Erzeugen eines Vorhanges paralleler Tropfenströme aufweist, wobei die Auffangvorrichtung aufweist:
    a) einen Vorrichtungskörper, der eine längliche Tropfenaufprallfläche aufweist, die an einen Bereich des strömenden Tropfenvorhangs angrenzt, so daß äquidistant strömungsabwärts gelegene Bereiche der Aufprallfläche im wesentlichen äquidistant zu entsprechenden Bereichen des strömenden Tropfenvorhangs sind;
    b) Mittel, die strömungsabwärts von der Tropfenaufprallfläche einen Tropfenaustrittskanal bilden, wobei der Kanal eine längliche Eintrittsmündung aufweist, die im wesentlichen parallel zu der an der Öffnungseinrichtung liegt;
    c) eine erste Netzeinrichtung, die mehrere Öffnungen aufweist, die eine einheitliche Größe haben und einheitlich voneinander beabstandet sind und entlang der Eintrittsmündung des Kanals angeordnet sind;
    d) wobei sich die erste Netzeinrichtung in dem Kanal sowohl strömungsabwärts in der Richtung des Tintenaustritts als auch über den Kanal erstreckt; und
    e) eine zweite Netzeinrichtung, die mehrere Öffnungen aufweist, die eine einheitliche Größe haben und einheitlich voneinander beabstandet sind und zwischen der ersten Netzeinrichtung entlang des Kanals angeordnet sind, um die erste Netzeinrichtung gegen Zusammendrücken zu schützen.
  6. Erfindung gemäß Definition in den vorhergehenden Ansprüchen, wobei die zweite Netzeinrichtung ein Netzelement aufweist, dessen Dicke und Beabstandung signifikant größer ist als die der ersten Netzeinrichtung.
EP93103268A 1992-03-20 1993-03-02 Auffangvorrichtung für kontinuierlichen Tintenstrahl mit Schirmstruktur Expired - Lifetime EP0561205B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US855994 1986-04-25
US07/855,994 US5469202A (en) 1992-03-20 1992-03-20 Continuous ink jet catcher with improved screen structure

Publications (3)

Publication Number Publication Date
EP0561205A2 EP0561205A2 (de) 1993-09-22
EP0561205A3 EP0561205A3 (de) 1994-03-30
EP0561205B1 true EP0561205B1 (de) 1996-10-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103268A Expired - Lifetime EP0561205B1 (de) 1992-03-20 1993-03-02 Auffangvorrichtung für kontinuierlichen Tintenstrahl mit Schirmstruktur

Country Status (4)

Country Link
US (1) US5469202A (de)
EP (1) EP0561205B1 (de)
JP (1) JP3420272B2 (de)
DE (1) DE69305394T2 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5812167A (en) * 1996-02-22 1998-09-22 Scitex Digital Printing, Inc. Cylindrical catcher assembly
DE69708963T2 (de) * 1996-04-30 2002-06-06 Scitex Digital Printing Inc Tintenauffangvorrichtung mit geringem Luftstrom für kontinuierlich arbeitenden Tintenstrahldrucker
EP0805030B1 (de) * 1996-04-30 2000-05-10 SCITEX DIGITAL PRINTING, Inc. Lippenheizelement für kontinuierlich arbeitenden Tintenstrahldrucker
US5739829A (en) * 1996-04-30 1998-04-14 Scitex Digital Printing, Inc. Bubble flow detection
US6187212B1 (en) * 1998-12-14 2001-02-13 Scitex Digital Printing, Inc. Device for balanced uniform flow and simplified construction to remove fluid from an ink jet printer
US6234620B1 (en) 1999-06-29 2001-05-22 Eastman Kodak Company Continuous ink jet printer catcher and method for making same
US6513918B1 (en) * 2000-09-07 2003-02-04 Eastman Kodak Company Screen mesh catcher for a continuous ink jet printer and method for making same
US6508542B2 (en) 2000-12-28 2003-01-21 Eastman Kodak Company Ink drop deflection amplifier mechanism and method of increasing ink drop divergence
US6676243B2 (en) 2001-11-02 2004-01-13 Eastman Kodak Company Continuous ink jet catcher having delimiting edge
US6820970B2 (en) 2001-11-02 2004-11-23 Eastman Kodak Company Continuous ink jet catcher having delimiting edge and ink accumulation border
US6592213B2 (en) 2001-12-14 2003-07-15 Eastman Kodak Company Continuous ink jet catcher
US6648461B2 (en) 2001-12-14 2003-11-18 Eastman Kodak Company Continuous ink jet catcher
US6840617B2 (en) * 2002-04-02 2005-01-11 Lexmark International, Inc. Mid-frame for an imaging apparatus
US6962411B2 (en) * 2003-01-02 2005-11-08 Eastman Kodak Company Anti-wicking catcher arrangement for a solvent ink printhead
US9044954B1 (en) 2012-05-14 2015-06-02 Videojet Technologies Inc. Ink jet printer
CN104507689B (zh) * 2012-05-14 2016-11-16 录象射流技术公司 喷墨打印机
US9227421B2 (en) * 2012-05-14 2016-01-05 Videojet Technoogies Inc. Ink jet printer
FR3045459B1 (fr) 2015-12-22 2020-06-12 Dover Europe Sarl Tete d'impression ou imprimante a jet d'encre a consommation de solvant reduite

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US3611422A (en) * 1969-11-17 1971-10-05 Mead Corp Ingesting catchers for noncontacting printing apparatus
US4010477A (en) * 1976-01-29 1977-03-01 The Mead Corporation Head assembly for a jet drop recorder
JPS5820870Y2 (ja) * 1977-07-28 1983-05-02 株式会社東芝 乾燥機
US4250510A (en) * 1979-09-04 1981-02-10 The Mead Corporation Fluid jet device
JPS57188362A (en) * 1981-05-15 1982-11-19 Ricoh Co Ltd Ink jet recording method
US4418352A (en) * 1981-05-18 1983-11-29 Ricoh Company, Ltd. Ink jet printing apparatus
US4460903A (en) * 1982-07-19 1984-07-17 Bell & Howell Company Ink jet catcher
US4560991A (en) * 1983-07-27 1985-12-24 Eastman Kodak Company Electroformed charge electrode structure for ink jet printers
US4757328A (en) * 1987-02-06 1988-07-12 Eastman Kodak Company Ink jet charging plant and drop-catcher assembly
US4994821A (en) * 1989-09-18 1991-02-19 Eastman Kodak Company Continuous ink jet printer apparatus having improved short detection construction
US5105205A (en) * 1991-07-01 1992-04-14 Eastman Kodak Company Continuous ink jet catcher device having improved flow control construction

Also Published As

Publication number Publication date
EP0561205A2 (de) 1993-09-22
JPH0640045A (ja) 1994-02-15
DE69305394T2 (de) 1997-02-27
DE69305394D1 (de) 1996-11-21
JP3420272B2 (ja) 2003-06-23
EP0561205A3 (de) 1994-03-30
US5469202A (en) 1995-11-21

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